Current velocity and habitat patchiness shape stream herbivore movement

Hoffman, Aaron L.; Olden, Julian D.; Monroe, Jeremy; Poff, N. LeRoy; Wellnitz, Todd; Wiens, John A.

doi:10.1111/j.2006.0030-1299.14675.x

Cited by 49 publications

(46 citation statements)

References 65 publications

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“…Though L. stagnalis seems to retain its wild behaviour even after several laboratory-reared generations (elger & barrat-segretain 2002(elger & barrat-segretain , naKadera et al 2015, gross & lombardo in press), the ecological significance of oviposition on shells remains unknown. For example, lymnaeids and physids are among the fastest-moving freshwater gastropods (boss et al 1984, hoFFman et al 2006, KaPPes & haase 2012, and L. stagnalis in particular is capable of active horizontal dispersal (Kobayashi et al 1998, KaPPes & haase 2012, suggesting that migrating clutch-bearing adults may increase the potential for colonisation of new habitats. L. stagnalis only oviposited on shells of live conspecifics, suggesting that such a behaviour may indeed have a strategic value for active colonisation of new habitats.…”

Section: Resultsmentioning

confidence: 99%

A note on oviposition by Lymnaea stagnalis (Linnaeus, 1758) (Gastropoda: Pulmonata: Lymnaeidae) on shells of conspecifics under laboratory conditions

Lombardo

Miccoli

2017

Folia Malac.

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Oviposition by Lymnaea stagnalis (L.) on shells of conspecifics has been reported anecdotally from laboratory observations. In order to gain the first quantitative insight into this behaviour, we have quantified the proportion of individuals bearing egg clutches in a long-term monospecific outdoor laboratory culture of L. stagnalis during two consecutive late-summer months. The snails were assigned to size classes based on shell height. Differences between the size class composition of clutch-bearers and of the general population were statistically compared by means of Pearson's distance χ² P analysis. Egg clutches were laid on snails of shell height >15 mm (i.e. reproductive-age individuals), with significant selection for the larger size classes (shell height 25-40 mm). While the mechanisms of and reasons behind such behaviour remain unknown, selection of larger adults as egg-carriers may have ecological implications at the population level.

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Section: Resultsmentioning

confidence: 99%

A note on oviposition by Lymnaea stagnalis (Linnaeus, 1758) (Gastropoda: Pulmonata: Lymnaeidae) on shells of conspecifics under laboratory conditions

Lombardo

Miccoli

2017

Folia Malac.

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“…From the starting point the larvae were not able to assess directly the abundance of the far upstream periphyton patches, at least not visually, because the head opening of the case is located at the bottom (Hoffman et al 2006). Also, other stream grazers, such as baetid mayflies, cannot locate food patches visually and they require mouthpart contact to search food patches (Kohler 1984).…”

Section: Discussionmentioning

confidence: 99%

“…Many stream organisms have positive rheotactic responses (Poff and Ward 1992;Olden et al 2004;Hoffman et al 2006), and rheotactic crawling toward the direction of flow is a basic movement of Glossosoma larvae. In fact, the degree of directness for the control treatment was about half that for the high periphyton level.…”

Section: Discussionmentioning

confidence: 99%

Upstream resource abundance determines the food searching behavior of a stream grazer: Effect of microalgal cues

Katano

Doi

Oishi

2009

Limnology & Oceanography

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To maximize their growth, grazers should shift their behavior to balance the cues from predators and periphyton in the field. As a stream grazer seeks periphyton that are heterogeneously distributed, a shift in its behavior on the basis of the intensity of microalgal cues would be beneficial as it would allow the grazer to feed on more periphyton. Using a caddisfly grazer, Glossosoma larvae, we conducted a laboratory channel experiment with upstream experimental plates having four levels of periphyton abundance (control, low, medium, and high), and we recorded the movement behavior of the larvae. As periphyton abundance increased, both larval crawling time and the total crawling distance to the periphyton patch significantly decreased and the directness of the crawling path significantly increased. That is, larvae crawled in various directions as they approached a relatively low-abundance periphyton patch, whereas they crawled straight to the high-abundance periphyton patch in a short time. The behavior change was likely due to the detection of some microalgal cue, which should intensify with an increase in upstream periphyton abundance.

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“…Although most work has a strong focus on local community composition, the need to consider the implications of local interactions for broader-scale diversity maintenance has been suggested (Roni et al 2008;Palmer et al 2014;Swan and Brown 2014). Streams exhibit complex, multiscaled environmental variation, while the dispersal characteristics linking dynamics at different locations are highly variable in terms of distance, timing, and direction (e.g., Frissell et al 1986;Hershey et al 1993;Poff 1997;Peckarsky et al 2000;Skalski and Gilliam 2000;Hoffman et al 2006). Any single definition of a local community fails to capture the resulting multiscale nature of community dynamics and diversity maintenance in streams, implying a need for the kind of theory developed here.…”

Section: Theory Of Streams and Advective Habitatsmentioning

confidence: 99%

Scale-Dependent Community Theory for Streams and Other Linear Habitats

Holt

Chesson

2016

The American Naturalist

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The maintenance of species diversity occurs at the regional scale but depends on interacting processes at the full range of lower scales. Although there is a long history of study of regional diversity as an emergent property, analyses of fully multiscale dynamics are rare. Here, we use scale transition theory for a quantitative analysis of multiscale diversity maintenance with continuous scales of dispersal and environmental variation in space and time. We develop our analysis with a model of a linear habitat, applicable to streams or coastlines, to provide a theoretical foundation for the long-standing interest in environmental variation and dispersal, including downstream drift. We find that the strength of regional coexistence is strongest when local densities and local environmental conditions are strongly correlated. Increasing dispersal and shortening environmental correlations weaken the strength of coexistence regionally and shift the dominant coexistence mechanism from fitness-density covariance to the spatial storage effect, while increasing local diversity. Analysis of the physical and biological determinants of these mechanisms improves understanding of traditional concepts of environmental filters, mass effects, and species sorting. Our results highlight the limitations of the binary distinction between local communities and a species pool and emphasize species coexistence as a problem of multiple scales in space and time.

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Current velocity and habitat patchiness shape stream herbivore movement

Abstract: 2006. Current velocity and habitat patchiness shape stream herbivore movement. Á Oikos 115: 358 Á368.

Cited by 49 publications

References 65 publications

A note on oviposition by Lymnaea stagnalis (Linnaeus, 1758) (Gastropoda: Pulmonata: Lymnaeidae) on shells of conspecifics under laboratory conditions

A note on oviposition by Lymnaea stagnalis (Linnaeus, 1758) (Gastropoda: Pulmonata: Lymnaeidae) on shells of conspecifics under laboratory conditions

Upstream resource abundance determines the food searching behavior of a stream grazer: Effect of microalgal cues

Scale-Dependent Community Theory for Streams and Other Linear Habitats

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